Swivel tube-coupling.



H. GASSIDY.

SWIVEL TUBE COUPLING.

APPLICATION FILED MAR. 27, 1912.

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HUGH GASSIDY, 0F BROOKLYN, NEW YORK.

SWIVEL TUBE-COUPLING.

Specification of Letters Patent.

Patented Oct. 14:, 1913.

Application filed March 27, 1912. Serial No. 686,609.

To all whom it may concern Be'it known that I, HUGH CAssmY, a citizen ofthe United States, and resident of Brooklyn, in the county of Kings andState of New York, have invented certain new and useful Improvements inSwivel Tube- Couplings, of which the following is a specification.

This invention relates to a pipe coupling and particularly to 'a swivelconnection or joint for connecting sections of pipe so as to permit arotary movement of one section with respect to the other.

A principal object of the invention is to produce a coupling of thiskind which will effectively pack the pipe connection to prevent leakagebut which is constructed in such a way as to permit a swivel movement atthe connection, and which will not tend to disturb the packing in anyway.

A further object of the invention is to provide a construction whichwill not exertany tendency to loosen the packing nut when the swivelingmovement takes place.

A further object of the invention is to provide a construction whichwill tend to relieve the packing of any tendency to be moved outwardlyfrom the face of the tube connection which is being packed.

In carrying out my invention, I .provide a tubular nipple or connectionhaving a collar held within the coupling. In ordinary swivel connectionssuch a collar is employed and the packing is compressed in the stuffingbox against this collar. In other words, the joint is packed against thecollar as well as against the side of the tubular pipe connection. In myconstruction, I relieve the collar of the nipple of all pressure andpack the connection solely on the cylindrical face of the tubular.connection. I not only relieve the collar of all pressure, but I providean arrangement permitting a slight longitudinal movement of the tubularconnection within the coupling' I also prefer to provide the nipple withan inner extension fitting accurately in a bore in the coupling body.This centers the nipple and prevents lateral play which would tend toloosen the packing.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaim.

In the drawing which fully illustrates my invention, Figure 1 is alongitudinal 4 central section through a swivel pipe couplingconstructed according to my 1nvention, the tubular nipple or pipeconnection being shown partly in elevation and partly in section. Fig. 2is a side elevation and partial section showing a portion of the innerend of the tubular nipple removed from the coupling.

Referring more particularly to the parts, 1 represents the body of thecoupling which has a neck 2, with internal threads beyond the point 3 toreceive one of the pipe sections 4: which are to'be connected together.The op osite end of the bod 1 is formed with a ore or stuffing box 5 ofenlarged diameter in which a suitable soft packing 6 is received. Theneck 2 is provided with a reduced central tubular bore 7 which iscounterbored so as to form a depressed seat 8 for a collar 9, which isformed upon a tubular nipple or pipe connection 10. Beyond collar 9, thenipple has a neck 11 which fits neatly in the bore 7 so as to center thenipple in the coupling. At the counter-bored seat 8, a collar recess 12is formed, which is deeper than the thickness of the collar 9, andaround the edge of the recess a second annular washer seat 13 is formed,which forms part of the inner end or bottom of the stuffing box 5. Onthis seat 13 I provide a washer or packing ring 14, through the opening15 of which the tubular nipple 10 passes loosely. The inner edge of thiswasher overhangs the recess 12 in the manner indicated in Fig. 1, andforms a stop for the collar 9 to limit the outward movement of thenipple 10. The outer side of the washer 14 is provided with an inclinedor beveled face 17, which tends to crowd the packing 6 against thelateral surface of the nipple 10 within the stufiing box. In order tocompress the packing in this way, I provide a gland 18 of ordinaryconstruction, which slides into the stufiing box as indicated. Thisgland is forced inwardly by means of a coupling nut 19 of common form,which has internal threads 20 received on threads 21 on the body 1. Theouter end of the nipplelO is provided with screw threads 22 to enablethe coupling to be attached to the pipe which is to be connected topipe-4. When the gland 18 is forced in, the pressure or thrust which thepacking 6 exerts against the ring or washer 14: is taken up by the seat13, audit will be evident that no, pressure whatever is exertcd upon thecollar 9. There is, therefore, no tendency for the collar 5) to rotatethe ring or washer l l when a swiveling movement takes place in thenipple and consequently, there is no tendency to rotate the packing andthe gland through the medium of the packing. Hence there is no tendencyto loosen the coupling nut 19.

Special attention is called to the function of the neck 11 in assistingin efl'ecting a non-leaking connection. This neck fitting neatly asitdoes in the bore 7, prevents any lateral play or movement of the bodyof the nipple 10, and by a consideration of the eon-' structiondescribed, it will be evident that this tends to prevent a loosening ofthe packing 6 around the packed zone of the tube 10.

What I claim and desire to secure by Letters Patent is A swivel couplinghaving a body with an enlarged bore, said bore having a Washerseat atthe bottom thereof, said body having a reduced bore, and a counterboreforming a recess and a collar seat at the bottom thereof, a tubularnipple lying in said enlarged bore having a collar lying in said recess,said collar being wholly received within said recess, said nipple havinga tubular neck received neatly in said reduced bore and preventinglateral movement of said nipple in said enlarged bore, a packing in saidenlarged bore, a rigid packing washer on said Washer-seat projectinginwardly over said recess to retain said collar and relieving saidcollar of the thrust of the packing, a gland extending into saidenlarged bore to compress the packing against said packing washer, and acoupling member for forcing said gland against said packing.

Signed at New York in the county of New York and State of New York this23rd day of March A. D. 1912.

HUGH CASSIDY. A. W. PALMER, MERLE I. ST. JOHN.

